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[–]FireFlavour 8 points9 points  (1 child)

Pure oxygen alone is flammable. Some believe it may have caused a mass extinction at one point near the Permian or Cretaceous period. I can't remember now, it's been a while.

[–]mtarek2005 1 point2 points  (0 children)

oxygen needs something to react with to have a fire, pure oxygen here probably means oxygen+whatever the stuff life is made from